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Title: Ionic liquid of [Bmim]{sup +}Cl{sup -} for the preparation of hierarchical nanostructured rutile titania

Abstract

The rutile titania with hierarchical nanostructure was conveniently prepared in a room temperature ionic liquid (RTIL) of [Bmim]{sup +}Cl{sup -} system. The obtained materials were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N{sub 2} adsorption-desorption analysis. XRD patterns revealed that only rutile phase was formed in the ionic liquid of [Bmim]{sup +}Cl{sup -}. The SEM and TEM micrographs as well as N{sub 2} adsorption-desorption measurements showed that the nanorods of rutile titania were interaggregated to fabricate a large mesoporous structure and the voids packed in the nanorods formed a small mesostructure. It was proposed that the formation of rutile crystal phase was due to high acidity and high Cl{sup -} content in the special reaction media, and also the combination of ionic liquid-templated effects with so-called reaction limited aggregation resulted in the hierarchical nanostructure. - Graphical abstract: Ionic liquid of [Bmim]{sup +}Cl{sup -} was employed to prepare rutile titania with hierarchical nanostructure, in which the nanorods were interaggregated to fabricate a large mesoporous structure and the voids packed in the nanorods formed a small mesostructure.

Authors:
 [1];  [2];  [2];  [3];  [4]
  1. Institute of Fine Catalysis and Synthesis, College of Chem. and Chem. Eng., Hunan Normal University, Changsha 410081 (China), E-mail: yuningya@yahoo.com.cn
  2. Institute of Fine Catalysis and Synthesis, College of Chem. and Chem. Eng., Hunan Normal University, Changsha 410081 (China)
  3. Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Teachers College, Hangzhou 310012 (China)
  4. Institute of Fine Catalysis and Synthesis, College of Chem. and Chem. Eng., Hunan Normal University, Changsha 410081 (China), E-mail: yindh@hunnu.edu.cn
Publication Date:
OSTI Identifier:
21015713
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 180; Journal Issue: 2; Other Information: DOI: 10.1016/j.jssc.2006.11.008; PII: S0022-4596(06)00593-7; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ADSORPTION; CHLORINE IONS; CRYSTALS; DESORPTION; LIQUIDS; NANOSTRUCTURES; PH VALUE; RUTILE; SCANNING ELECTRON MICROSCOPY; TEMPERATURE RANGE 0273-0400 K; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; VOIDS; X-RAY DIFFRACTION

Citation Formats

Yu Ningya, Gong Liming, Song Huijuan, Liu Yong, and Yin Donghong. Ionic liquid of [Bmim]{sup +}Cl{sup -} for the preparation of hierarchical nanostructured rutile titania. United States: N. p., 2007. Web.
Yu Ningya, Gong Liming, Song Huijuan, Liu Yong, & Yin Donghong. Ionic liquid of [Bmim]{sup +}Cl{sup -} for the preparation of hierarchical nanostructured rutile titania. United States.
Yu Ningya, Gong Liming, Song Huijuan, Liu Yong, and Yin Donghong. Thu . "Ionic liquid of [Bmim]{sup +}Cl{sup -} for the preparation of hierarchical nanostructured rutile titania". United States. doi:.
@article{osti_21015713,
title = {Ionic liquid of [Bmim]{sup +}Cl{sup -} for the preparation of hierarchical nanostructured rutile titania},
author = {Yu Ningya and Gong Liming and Song Huijuan and Liu Yong and Yin Donghong},
abstractNote = {The rutile titania with hierarchical nanostructure was conveniently prepared in a room temperature ionic liquid (RTIL) of [Bmim]{sup +}Cl{sup -} system. The obtained materials were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N{sub 2} adsorption-desorption analysis. XRD patterns revealed that only rutile phase was formed in the ionic liquid of [Bmim]{sup +}Cl{sup -}. The SEM and TEM micrographs as well as N{sub 2} adsorption-desorption measurements showed that the nanorods of rutile titania were interaggregated to fabricate a large mesoporous structure and the voids packed in the nanorods formed a small mesostructure. It was proposed that the formation of rutile crystal phase was due to high acidity and high Cl{sup -} content in the special reaction media, and also the combination of ionic liquid-templated effects with so-called reaction limited aggregation resulted in the hierarchical nanostructure. - Graphical abstract: Ionic liquid of [Bmim]{sup +}Cl{sup -} was employed to prepare rutile titania with hierarchical nanostructure, in which the nanorods were interaggregated to fabricate a large mesoporous structure and the voids packed in the nanorods formed a small mesostructure.},
doi = {},
journal = {Journal of Solid State Chemistry},
number = 2,
volume = 180,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}
  • The infrared predissociation spectra of [bmim] +·(H 2O) n, n = 1–8, in the 2800–3800 cm –1 region are presented and analyzed with the help of electronic structure calculations. The results show that the water molecules solvate [bmim]+ by predominately interacting with the imidazolium C2–H moiety for the small n = 1 and 2 clusters. This is characterized by a redshifted and relatively intense C2–H stretch. For n ≥ 4 clusters, hydrogen-bond interactions between the water molecules drive the formation of ring isomers which interact on top of the imidazolium ring without any direct interaction with the C2–H. The watermore » arrangement in [bmim]+·(H 2O) n is similar to the low energy isomers of neutral water clusters up to the n = 6 cluster. This is not the case for the n = 8 cluster, which has the imidazolium ring disrupting the otherwise preferred cubic water structure. Here, the evolution of the solvation network around [bmim]+ illustrates the competing [bmim]+–water and water–water interactions.« less
  • A fast ionic composite is prepared by dispersion of Ionic liquid [Bmim][PF{sub 6}] in Li{sub 2}SO{sub 4}−Li{sub 2}O−P{sub 2}O{sub 5} glass matrix by mixing and through grinding. Amorphous/glassy nature of the samples is confirmed by X-Ray diffraction (XRD). Surprisingly, the electrical conductivity of the samples is found to be increasing by ∼ 2 orders of magnitude and exhibits typical Arrhenius behavior with low activation energy. DC polarization and impedance spectroscopy measurements suggest that samples are essentially ionic in nature. The conductivity isotherms were also obtained at different temperatures (T < 100 °C) and found to be appreciably stable at leastmore » for ∼ 10 days.« less
  • Graphical abstract: Display Omitted Highlights: ► First time, we have used [Bmim][TfO]IL for the synthesis of Co{sub 3}O{sub 4} nanoworms. ► IL assists to form oriented growth of cubic Co{sub 3}O{sub 4} nanoworms without intermediate. ► Cubic Co{sub 3}O{sub 4} nanoworms are in the range of 20 nm width and 100–200 nm length. ► IL and oxidizing agent have not altered the Co{sub 3}O{sub 4} structural characteristics. ► Co{sub 3}O{sub 4} nanoworms exhibit crystalline domain dependent weak ferromagnetism. -- Abstract: Monodispersed worm-like structure of Co{sub 3}O{sub 4} nanocrystals of 20 nm width and 100–200 nm length are prepared directly withoutmore » any intermediate product by 1-n-butyl-3-methylimidazolium trifluoromethane sulfonate ionic liquid ([Bmim][TfO] IL) assisted precipitation method. The higher concentration of [Bmim][TfO] IL in the reaction medium leads to the formation of homogeneous nanoworms. The effect of synthesis temperature and the oxidizing agent (H{sub 2}O{sub 2}) on the Co{sub 3}O{sub 4} particle's morphology and their magnetic properties are discussed. Thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) analysis were used to characterize the Co{sub 3}O{sub 4} monodispersed nanoworms. The magnetic property of the spinel Co{sub 3}O{sub 4} nanoworms is highly dependent on crystalline domains and exhibits weak ferromagnetic behavior with a narrow hysteresis loop opening.« less
  • Composition dependent structural and dynamical properties of aqueous hydrophobic 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF{sub 6}]) ionic liquid (IL) have been investigated by using all-atom molecular dynamics simulation. We observe that addition of water does not increase significant number of dissociated ions in the solution over the pure state. As a consequence, self-diffusion coefficient of the cation and anion is comparable to each other at all water concentration similar to that is observed for the pure state. Voronoi polyhedra analysis exhibits strong dependence on the local environment of IL concentration. Void and neck distributions in Voronoi tessellation are approximately Gaussian for pure ILmore » but upon subsequent addition of water, we observe deviation from the Gaussian behaviour with an asymmetric broadening with long tail of exponential decay at large void radius, particularly at higher water concentrations. The increase in void space and neck size at higher water concentration facilitates ionic motion, thus, decreasing dynamical heterogeneity and IL reorientation time and increases self-diffusion coefficient significantly.« less